水生生物学报2013，Vol.37Issue(1)：125-131,7.DOI:10.7541/2013.125
卤虫投喂下长吻(鱼危)仔稚鱼消化酶发育和口宽变化的研究
VARIATION OF DIGESTIVE ENZYMES AND MOUTH WIDTH DURING LARVAL DEVELOPMENT OF CHINESE LONGSNOUT CATFISH (LEIOCASSIS LONGIROSTRIS GüNTHER) FED WITH ARTEMIA
摘要
Abstract
Ontogentic changes of four digestive enzymes (amylase, lipase, trypsin, pepsin) and the morphological parameters of total length and mouth width were investigated in Chinese longsnout catfish larvae fed with Artemia. The experiment lasted for 13 days. The results showed that 1) total length (TL) and mouth width (MW) of the larvae increased linearly with time after hatching (R2TL = 0.974, R2Mw = 0.964; P<0.05). The ratio of mouth width to total length decreased from 5 to 7dph (days after hatching) (P<0.05) and then reached to a plateau at 0.07-0.08. The fact that mouth width developed synchronically with total length from 7dph indicated the beginning of the weaning time. All the digestive enzymes were detected at the first feeding. Trypsin activity was significant higher in 5-7dph larvae than that of the newly hatched fish, which accompanied the first feeding behavior at 5dph. Pepsin and lipase activities in 7dph larvae and amylase activities in 6dph larvae were significantly higher than that of the newly hatched larvae. The high and stable activities of the digestive enzymes during 8-13dph indicated that the digestive tract was fully developed.关键词
长吻(鱼危)/消化酶/仔鱼/口宽/全长Key words
Leiocassis longirostris Gunther/ Digestive enzyme/ Larvae/ Mouth width/ Total length分类
农业科技引用本文复制引用
刘变枝,朱晓鸣,雷武,韩冬,杨云霞,金俊琰,解绶启..卤虫投喂下长吻(鱼危)仔稚鱼消化酶发育和口宽变化的研究[J].水生生物学报,2013,37(1):125-131,7.基金项目
现代农业产业技术体系建设专项资金(CARS-46-19) （CARS-46-19）
公益性行业(农业)专项"水产养殖动物营养需求与高效配合饲料开发(201003020)" （农业）
公益性行业(农业)科研专项"饲料高效低耗加工技术研究与示范(201203015)"公益性行业(农业)科研专项"淡水池塘工程化改造与环境修复技术研究与示范(201203083)"资助 （农业）
